On November 12, the grid pier No. 9 of the Nanxi River Special Bridge of the Wenshan to Mengzi Railway in Yunnan was successfully completed. This is the first time that a grid pier structure has been applied in a domestic railway project. The bridge has a total length of 789.71 meters, and the maximum height difference between the bridge deck and the ground is 118 meters. The steel-tube concrete lattice pier can save 30% to 50% of concrete and steel, the prefabricated assembly process reduces pollution and construction risks, and enhances seismic resistance and geological adaptability. The Wenmeng Railway has a total length of about 116 kilometers and a design speed of 160 kilometers per hour. It is a national Class I two-line passenger and cargo common line electrified railway. Currently, about 63% of the total station front project has been completed.

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